Fastener for furniture installation

Abstract

The utility model discloses a fastener for furniture installation. The fastener comprises an embedded installation sleeve, a supporting frame and a bolt. An internal thread structure and an external thread structure are arranged on the pre-embedded mounting sleeve, and a plurality of axially arranged open grooves are formed in the pre-embedded mounting sleeve; the supporting frame comprises a plurality of supporting legs, the supporting legs are in a folded state, and a plurality of anchoring thorns are arranged on the outer sides of the supporting legs; the supporting frame is arranged in the pre-embedded installation sleeve, when the bottom of the bolt is inserted into the pre-embedded installation sleeve, the supporting feet of the supporting frame can be opened, and the anchoring thorns on the supporting feet stretch out of the open grooves. According to the utility model, a composite anchoring system is formed by pre-embedding and fixing of the external thread structure and embedding and locking of the anchoring thorns, so that the anti-loosening capability can be greatly improved by double constraints of axial occlusion and radial grabbing, and the problem of stress relaxation under long-term load is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to a fastener for furniture installation. Background Technology

[0002] In the furniture manufacturing industry, fasteners, as key connecting elements, directly affect the bonding strength of wood or composite materials and the overall structural stability of the furniture. Currently, there are two types of fasteners available for furniture assembly:

[0003] One type is a combination structure of internally and externally threaded embedded parts and bolts. The installation process requires pre-screwing the embedded part with external threads into the mounting hole, and then fixing it by the engagement of the bolt with the internal threads of the embedded part. However, this structure has obvious defects in actual use: since it relies solely on the engagement of the threads for fixing, it is prone to loosening under long-term load or vibration, resulting in reduced reliability of the connection structure.

[0004] The second approach uses a combination of hammer-driven nuts and bolts. This technique requires a through-hole to be made in the bottom sidewall of the mounting hole, allowing the bolt to be laterally locked into its threaded hole by embedding a hammer-head nut. While this approach effectively overcomes the loosening problem, it presents two technical bottlenecks: First, the sidewall opening not only affects the integrity of the finished product's appearance but also significantly increases assembly complexity due to the additional processing steps; second, the lateral through-hole weakens the material's structural strength, potentially leading to the risk of plate cracking in certain application scenarios. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a fastener for furniture installation that avoids the need for drilling holes and improves the stability of the installation.

[0006] Therefore, the technical solution of this utility model is: a fastener for furniture installation, including a pre-embedded mounting sleeve, a support frame, and a bolt; the pre-embedded mounting sleeve is provided with an internal thread structure and an external thread structure, and the pre-embedded mounting sleeve is provided with several axially arranged slots; the support frame includes multiple legs, the legs are in a retracted state, and several anchoring spikes are provided on the outer side of the legs; the support frame is placed inside the pre-embedded mounting sleeve, and when the bottom of the bolt is inserted into the pre-embedded mounting sleeve, the legs of the support frame can be opened, and the anchoring spikes on the legs protrude from the slots.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: the upper end of the pre-embedded mounting sleeve is provided with a hexagonal hole, and the internal thread structure is connected through the stepped surface in the hexagonal hole; the top of the support frame is provided with a hexagonal frame, and the support legs are fixed on the hexagonal frame; the hexagonal frame is placed on the stepped surface.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the number of slots on the pre-embedded mounting sleeve is the same as the number of legs on the support frame, and their positions correspond one-to-one.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the anchoring spike is a conical structure with several axial grooves on its outer circumference.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme: when the support leg is opened by the bolt, the anchoring spikes protrude from the slot and are higher than the external thread structure.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. By pre-embedding the external thread structure and locking the anchoring spikes to form a composite anchoring system, the dual constraints of axial engagement and radial gripping can be achieved, which can greatly improve the anti-loosening ability and effectively overcome the stress relaxation problem under long-term load.

[0013] 2. By utilizing the axial slots on the pre-embedded mounting sleeve and the retractable legs of the support frame, the anchoring spikes are directionally expanded under the drive of bolts, allowing the anchoring spikes to penetrate into the wooden furniture and achieve interlayer interlocking of the matrix fibers in the composite board, thus achieving an anti-loosening effect. Furthermore, there is no need to avoid opening holes in the side walls, maintaining the integrity of the component's appearance. Attached Figure Description

[0014] Figure 1 This is an exploded view of the connection of this utility model;

[0015] Figure 2 This is a schematic diagram illustrating the working principle of the support frame of this utility model;

[0016] Figure 3 This is a schematic diagram of the support frame of this utility model;

[0017] Figure 4 for Figure 3 A magnified view of a portion of the image.

[0018] The markings in the figure are: 1. Embedded mounting sleeve, 11. Internal thread structure, 12. External thread structure, 13. Hexagonal hole, 14. Stepped surface, 15. Slot, 2. Support frame, 21. Hexagonal frame, 22. Support leg, 23. Anchor spike, 24. Axial groove, 3. Bolt. Detailed Implementation

[0019] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0021] See the attached drawings. The fastener for furniture installation described in this embodiment includes a pre-embedded mounting sleeve 1, a support frame 2, and a bolt 3; the pre-embedded mounting sleeve 1 is provided with an internal thread structure 11 and an external thread structure 12, and the upper end of the pre-embedded mounting sleeve 1 is provided with a hexagonal hole 13, and the internal thread structure 11 is connected to the hexagonal hole 13 through a stepped surface 14, and the hexagonal hole 13 is convenient to rotate with an Allen wrench.

[0022] The pre-embedded mounting sleeve 1 has several axially arranged slots 15, which penetrate the side wall of the pre-embedded mounting sleeve 1. The support frame 2 has a hexagonal frame 21 at the top, and the support frame 2 includes multiple legs 22, which are fixed to the hexagonal frame 21. The number of slots 15 on the pre-embedded mounting sleeve 1 is the same as the number of legs 22 on the support frame 2, and their positions correspond one-to-one. The outer side of the legs 22 is provided with several anchoring spikes 23. The anchoring spikes 23 have a conical structure and several axial grooves 24 on their outer circumference. When the anchoring spikes 23 are inserted into the wooden furniture, the axial grooves 24 can increase the contact area with the wooden furniture and improve the bonding force.

[0023] In the initial state, the support leg 22 is folded and can be placed into the pre-embedded mounting sleeve 1, and the hexagonal frame 21 is placed on the stepped surface 14. When the bolt 3 is screwed in, the bottom of the bolt 3 inserts into the pre-embedded mounting sleeve 1, which can open the support leg 22 of the support frame 2, so that the anchoring spike 23 on the support leg 22 protrudes from the slot 15 and is higher than the external thread structure 12. The anchoring spike 23 will insert into the wooden furniture, improving the installation firmness.

[0024] During installation, drilling holes in the wooden furniture and using a hex wrench to screw the pre-embedded mounting sleeve 1 into the mounting holes, then fixing the pre-embedded mounting sleeve 1 in the mounting holes through the external thread structure 12; then placing the folded support frame 2 into the pre-embedded mounting sleeve 1, and then placing the other component, and screwing the bolt 3 through the other component into the pre-embedded mounting sleeve 1. At the same time, the bolt 3 will open the support leg 22 of the support frame 2, so that the anchoring spike 23 on the support leg 22 protrudes from the slot 15 and inserts into the wooden furniture, preventing the pre-embedded mounting sleeve 1 from loosening and falling off, and improving the installation strength of the furniture.

[0025] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A fastener for furniture assembly, characterized in that: It includes a pre-embedded mounting sleeve, a support frame, and bolts; the pre-embedded mounting sleeve has an internal thread structure and an external thread structure, and has several axially arranged slots; the support frame includes multiple legs, which are in a retracted state, and have several anchoring spikes on the outer side of the legs; the support frame is placed inside the pre-embedded mounting sleeve, and when the bottom of the bolt is inserted into the pre-embedded mounting sleeve, the legs of the support frame can be opened, and the anchoring spikes on the legs protrude from the slots.

2. The fastener for furniture assembly as described in claim 1, characterized in that: The pre-embedded mounting sleeve has a hexagonal hole at its upper end, and an internal thread structure is connected to the hexagonal hole through a stepped surface; the support frame has a hexagonal frame at its top, and the support legs are fixed on the hexagonal frame; the hexagonal frame is placed on the stepped surface.

3. A fastener for furniture assembly as described in claim 1, characterized in that: The number of slots on the pre-embedded mounting sleeve is the same as the number of legs on the support frame, and their positions correspond one-to-one.

4. A fastener for furniture assembly as described in claim 1, characterized in that: The anchoring spike has a conical structure with several axial grooves on its outer circumference.

5. A fastener for furniture assembly as described in claim 1, characterized in that: When the support leg is opened by the bolt, the anchoring spikes protrude from the slot and are higher than the external thread structure.

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